And this has been the case since Windows NT in 1993 according to a presentation I saw from Sami Laiho where he strongly argues that you don't need and should be a admin account as default.

From microsoft's documentation [1] > Administrator-to-kernel is not a security boundary.

I recommend the talk https://www.youtube.com/watch?v=Y09nAxZFKzc

[1] https://www.microsoft.com/en-us/msrc/windows-security-servic...